Spring tension parting strip



Sept. 17, 1940- o. A. HEDMAN SPRING TENSION PARTING STRIP Filed Nov. 18,1959 Patented Sept. 17, 1940 UNITED STATES SPRING TENSION PAR'HNG same IOscar A. Hedman, San Francisco, Calif.

Application November 18, 1939, Serial No. 305,163

5 Claims.

This invention relates to a spring tension part- ..ing strip, and it isan object of the invention to provide a strip of this kind which isparticularly adapted for use in connection with double-hung orhslidingwindows.

It is also an object of the invention to provide a strip of this kind soconstructed that it will keep windows'tight and permit the sashes toeasily slide up and down under all weather con- ;ditions and which alsoserves to eliminate ratine- Another object of the invention is toprovide 'a strip. of this kind comprising an elongated member placedwithin a packing strip and wherein said strip has outer marginalportions provided with inwardly disposed flanges overlying the outerface of the strip and occupying different planes so that said flangesmay have move- .ment across the adjacent face of the elongated memberwithout interfering one with the other, .together withmeans coactingwith said flanges without interfering with the desired movements thereonto positively prevent fouling of said flanges.

Still another object ofthe invention is to provide a'spring tensionparting strip with all sharp edges covered, to prevent persons operatingthe window, cleaning, painting, etc., from possible injury, and withsufficient expansion on both sides to absorb the existing spaces in thewindow frame provided for the purpose of expansion and contraction ofthe wood due to weather conditions.

The invention consists in the details of construction and in thecombination and arrangement of the several parts of my improved springtension parting strip whereby certain important advantages are attainedand the device rendered ,simpler, less'expensive and otherwise moreconvenient and advantageous for use, as will be hereinafter more fullyset forth.

- The novel features of my invention will hereinafter be definitelyclaimed.

In order that my invention-may be the better -understood, I will nowproceed to describe the same with reference to the accompanying drawing,wherein:

Figure 1 is a transverse sectional view illustrating a parting stripconstructed in accordance with anembodiment of my invention in appliedposition;

.FigureZ is a fragmentary view in perspective of my improved strip, theassociated sashes being omitted,

' .As disclosed in the accompanying drawing, 1 denotes a side member ofa window frame. nd

which sidemember is provided, as is well known, with theouter bead 2 andan inner bead}.

Centrally of these beads 2 and 3 the outer face of the side member l isprovided with the usual parting strip, groove 4.. 4 A

. i .5 As herein disclosed, :my improved parting strip comprises anelongated body member 5 of desired dimensions and preferably of wood.Coextensive in length withthe-member 5 is a packing strip 6 of spring.copper or other suitable metal and which issubstantially U-shaped incross .seotio-nwith the base portion of the packing .strip snuglyreceiving a longitudinal marginal portion .of the member .5.Theseportions .of the packing strip Bend the body member .5 [arereceived withinthe par-ting .stripgroove 4 in the usual way.

The portions of the side walls 1 of the packing strip which .arevdisposed outwardly beyond the :along from substantially one end to theother These.,30.

with .the .inwar dly,. .disposed flanges 9. flanges 9, in. addition togiving a neat finish tothe parting; strip ,as a whole also materially I;

strengthen or, reinforce the side walls I of. the packing strip, and ina manner to assure a maximum of efficiency. of said side walls I.

It is toibe notedthat the flanges 9 are not coplanar' but one isslightly offset with respect to the .otherso that said flanges may have.relative movement acrossthe adjacent outer face of the member 5 withoutsaid flanges .9 fouling or contacting onewith the other. By thisarrangement the flanges 9 may be of a width substantially the same asthe width of the adjacent face of the member 5. By having the flanges 9freely mov-' ing one inwardly of the other without contact or fouling,the outer marginal portions of the side walls l maybe'initiallyispreadapart to allow the flanges 9' to have movement across the adjacent outerface of the member 5 from substantially edge to edge of said outer "faceof the member 5.,

,The portions oftheside walls of the packing I strip which contact withthe stiles 8 of the sashes readily permit said-sashes to be raised-.orlowered without sticking-irrespective of weather conditions and,furthermore, the inherent resiliencyof said outer portions of the sidewalls I, of the packing strip force the sashes S toward the heads 2 and3 and thereby eliminate rattling.

Anchored to one side face of the body member 5 and coextensive in lengththerewith is a metal strip I0 preferably of spring copper and which hasits outer longitudinal marginal portion defined by the flange II whichextends substantially across the entire width of the face of the member5 and occupying a position between the flanges 9.

The flange II of the strip I0 is of utmost importance as it provides apositive means to prevent the flanges 9 from interfering'with eachother. This is of particular advantage in connection with old windowswhere a greater expansion is necessary.

As is clearly illustrated in the accompanying drawing, the innermarginal portion of the flange II underlies the free marginal portion ofthe outer flange 9 and overlies the inner marginal portion of the secondflange 9. The outer longitudinal margin of the flange I I is continuedby a "marginal portion of the outermost flange 9. The

junction I5 between the flanges II and I2 is formed to provide a roundededge as is also the returned portion I4. This reverted flange I2 servesto maintain the outermost flange 9 in effective working position whilethe flange I I ooacts with the inner flange 9 to maintain such flange inits required position with respect to the outermost flange 9 therebypreventing contact or fouling of the flanges 9 one with the other. Thereverted flange I2 together with the returned portion I4 also eliminatesharp edges which is to be avoided in a parting strip of the type hereinembodied.

' Considering that'metal to be used in the con- 'struction of thisparting strip mustbe less than .006 of an inch in thickness, thearrangements of the three flanges gives the parting strip a finishedappearance whether open or closed.

.The free longitudinal marginal portions of the flanges 9 are capable ofa certain amount of bulge or wave which is not prevented by the revertedflange I2 although hidden thereby. This bulge or wave of the flanges 9'is caused by the fact that only one-half of the length of the strip isclosed by the sash on either side as each sash is substantially one-halfthe height of the window. When the sash is down, there is nothingagainst the side wall of the strip at the upper half thereof with theresult that said upper half will gradually expand. As a flange 9 cannotbend edgewise it must bulge.

From the foregoing description it is thought to be obvious that a springtension parting strip constructed in accordance with my invention isparticularly well adapted for use by reason of the principles and spiritthereof and for this reason I do not wish to be understood as limitingmyself to the precise arrangement and formation of the several partsherein shown in carrying out my invention in practice except ashereinafter claimed.

I claim:

1'. A parting strip for a window frame comprising an elongated member, apacking strip of spring metal substantially U-shaped in cross sectionand in which the member is positioned, the inner portions of the sidewalls of the strip being closely adjacent to the inner portion of themember, the outer portions of said side walls being inclined outwardlyfrom the member, the outer marginal portions of the side walls, havinginwardly directed flanges one positioned outwardly with respect to theother, and a metallic strip secured to a side face of the elongatedmember and having a flange therealong overlying the outer edge face ofthe elongated member and positioned between the flanges of the sidemembers of the packing strip.

2. A parting strip for a window frame comprising an elongated member, apacking strip of spring metal substantially U-shaped in cross sectionand in which the member is positioned, the inner portions of the sidewalls of the strip being closely adjacent to the inner portion of themember, the outer portions of said side walls being inclined outwardlyfrom the member, the outer marginal portions of the side walls havinginwardly directed overlapping flanges one positioned outwardly withrespect to the other, and a metallic strip secured to a sideface of the.elongated member and having a flange therealong overlying the outer edgeface'o-f the elongated member and positioned between the flanges of theside members of the packing strip, the flange of the side stripextending substantially entirely across the outer face of the elongatedmember.

3. A parting strip for a window frame comprising an elongated member, apacking strip of spring metal substantially U-shaped in cross sectionand in which the member is positioned, the

inner portions of the side walls of the strip being closely adjacent tothe inner portion of the member, the outer portions of said side wallsbeing inclined outwardly from the member, the outer marginal portions ofthe side walls having inwardly directed flanges one positioned outwardlywith respect to the other, and a metallic strip secured to a side faceof the elongated member and having a flange therealong overlying'theouter'edge face of the elongated member and ond strip being providedwith a reverted flange overlying the inner free marginal portionof theoutermost of the first two named flanges.

4. A parting strip for a window frame comprising an elongated member, apacking strip of spring metal substantially U-shaped in cross sectionand in which the member is positioned, the inner portions of the sidewalls of the strip being closely adjacent to the inner portion of themember, the outer portions of said side walls being inclined outwardlyfrom the member, the outer marginal portions of the' side walls havinginwardly directed flanges one positioned outwardly with respect to theother, and a metallic strip secured to a side face of the elongatedmember and having a flange therealong overlying the outer edge face ofthe elongated member and positioned between the flanges of the sidemembers of the packing strip, the flange of the second strip beingprovided with a reverted flange overlying the inner free marginalportion of the outermost of the first two named flanges, the outerlongitudinal marginal portion of the reverted flange being rounded.

5. A parting strip for a window frame comprising an elongated member, apacking strip of spring metal substantially U-shaped in cross sectionand in which the member is positioned, the side walls of the packingstrip being outwardly expansible by means of spring action, said sidewalls having inwardly directed flanges, and a stationary metallic striphaving a flange positioned between the two first named flanges,overlying the innermost, and a reverted flange overlying the outermostof the two moving flanges, the extreme edge of the reverted flange beinginwardly 5 directed, thus covering all sharp edges.

' OSCAR A. HEDMAN.

